Strain-insulator.



W. SCHAAKE.

STRAIN INYSULATOR.

APPLICATION man 1Au.|4.1o|a.

Patented 0m '15, 1918.

mt mm T N 6 m m m WiTNESSES:

' ATTORNEY UNITED STATES PAZIENT onmon.

WILLIAM SCHAAKE, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 WESTINGHOUSE ELECTRIC 8n MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

STRAIN-INSULATOB.

To all whom it may concern:

Be it known that I, WILLIAM SCHAAKE,.

a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Strain-Insulators, of which the following is a specification.

My invention relates to insulators and particularly to insulators of the strain or the suspension type.

One object of my invention is to provide an insulator, of the above-indicated character, that shall be simple in construction, and that shall be capable of withstanding severe electrical and mechanical stresses.

Another object of my invention is to provide an insulator that shall require substantially no machine work. and substantially all of the elements of which may be assembled by hand, thereby minimizing the cost of producing the same and facilitating the manufacture thereof.

In practising my invention, I provide terminal or eye members having laterally extending end portions that are surrounded by insulating and metallic bands or tubes in such manner that the material, which is subjected'to strain, is under compression, and an insulator in which the component members are so interlocked as to prevent 4v mechanical rupture of a line, in which it may be inserted, even though the insulation should fail.

Figure 1 of the accompanying drawings is a sectional view of an insulator embodying my invention; Fig. 2 is a sectional view taken along the line IIII of Fig. 1, and Fig. 3 is a perspective sectional view of the insulator shown in the preceding figures.

A laterally divided twopart cylindrical member 1, of insulating material, surrounds, and extends outwardly beyond, semi-cylindrical inner end portions 2 of radially extending eye or terminal members 3 and serves to hold the portions 2 in engagement with a cylindrical member 4, of insulating material, over which they are fitted. A bolt 5,having'a head 6 and a cooperating nut 7, extends axially through the member 4, through washers 8, of insulating material,

that fill the ends of the member 1, and

through metallic cap members 9 to rigidly secure the latter against the ends of the member 1. Each of the cap members 9 1s Specification of Letters Patent.

Patented Oct. 15, 1918.

Application filed January 14, 1918. Serial No. 211,868. v

provided with a flange portion 10-that extends inwardly to surround the portions 2, and a casing 11, of insulating material, is

molded, or otherwise mounted, over the entire structure, with the exception of the outer ends of the terminal members 3.

It may be seen that, with the exception of the molded casing 11, all of the parts, which are small and unmachined, may be readily assembled by hand; and that the stresses, caused by an outward pull on the members 3 and 2, are taken up by a compression of the member 1 against the flanges 10. i

While I have shown'and described a particular form of my invention, it will. be obvious to those skilled in the art that changes may be effected therein without departing from the spirit and scope of the same, as indicated by the appended claims.

I claim as my invention:

1. An insulator comprising a tubular structure, terminal members radially extending from intermediate points thereof and having lateral inner extensions, and members embracing the portions of said tubular structure that surround said lateral extensions to receive the strains imposed upon the tubular structure by the said ter-' tubular member, and a member embracing the portions of said tubular member that surround said lateral extensions to receive the strains imposed'upon the tubular mem-- her by the said terminal members.

3. An insulator comprising a tubular structure of insulating material, terminal members radially extending from intermediate points thereof and having lateral inner extensions, a body of insulating ma terial disposed between the inner ends of the said terminal members, and members embracing the portions of said tubular structure that surround the inner extensions to receive the strains imposed upon the tubular structure by the said terminal members.

i. An insulator comprising a tubular structure of insulating material, terminal members radially extending from intermediate points thereof and having lateral inner extensions, a body of insulating'material diate points thereof and having lateral inner extensions, cap members for the ends of the said tubular structure having flanges that embrace the portions thereof that surround the lateral extensions, a transversely extending bolt for securing the said cap members in engagement with the said tubular structure,-and bodies of insulating material providing spacing and separating means for the said lateral extensionsfromthe said caps and the said bolt.

6. An insulator comprising a two-part cylindrical member of insulating material, radially extending terminal members disposed therebetween and havin lateral inner extensions, cap members for t e ends of the saidcylindrical member having inwardly extending flanges that surround theouter ends of the said lateral extensions, a' clamp-. v

ing bolt for said cap members, bodies of insulating material serving to separate the said lateral extensions from each other and from the said cap members and their co-' operating bolt, and a body of molded in sulating material covering the said cylindrical member and the said cap members.

In testimony whereof, I have hereunto subscribed myname this 29th day of Dec.

. WILLIAM SCHAAKE. 

